Overturn - thermal stratification, Biology

Overturn - Thermal stratification

The summer or winter stratification is seasonal. Circulation of lake water occurs twice a year, in the spring and autumn (fall) seasons by a process called overturn. This circulation is important for lakes which .undergo stratification as it allows thorough mixing of oxygen, phytoplankton and nutrients within the lake. Let us now understand the process of overturn both in the spring and autumn seasons.